Class RandomSubset
- java.lang.Object
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- weka.filters.Filter
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- weka.filters.SimpleFilter
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- weka.filters.SimpleStreamFilter
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- weka.filters.unsupervised.attribute.RandomSubset
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- All Implemented Interfaces:
java.io.Serializable
,CapabilitiesHandler
,OptionHandler
,RevisionHandler
,StreamableFilter
public class RandomSubset extends SimpleStreamFilter
Chooses a random subset of attributes, either an absolute number or a percentage. The class is always included in the output (as the last attribute). Valid options are:-D Turns on output of debugging information.
-N <double> The number of attributes to randomly select. If < 1 then percentage, >= 1 absolute number. (default: 0.5)
-S <int> The seed value. (default: 1)
- Version:
- $Revision: 5547 $
- Author:
- fracpete (fracpete at waikato dot ac dot nz)
- See Also:
- Serialized Form
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Constructor Summary
Constructors Constructor Description RandomSubset()
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Method Summary
All Methods Static Methods Instance Methods Concrete Methods Modifier and Type Method Description Capabilities
getCapabilities()
Returns the Capabilities of this filter.double
getNumAttributes()
Get the number of attributes (< 1 percentage, >= 1 absolute number).java.lang.String[]
getOptions()
Gets the current settings of the filter.java.lang.String
getRevision()
Returns the revision string.int
getSeed()
Get the seed value for the random number generator.java.lang.String
globalInfo()
Returns a string describing this filter.java.util.Enumeration
listOptions()
Returns an enumeration describing the available options.static void
main(java.lang.String[] args)
Runs the filter with the given parameters.java.lang.String
numAttributesTipText()
Returns the tip text for this property.java.lang.String
seedTipText()
Returns the tip text for this property.void
setNumAttributes(double value)
Set the number of attributes.void
setOptions(java.lang.String[] options)
Parses a given list of options.void
setSeed(int value)
Set the seed value for the random number generator.-
Methods inherited from class weka.filters.SimpleStreamFilter
batchFinished, input
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Methods inherited from class weka.filters.SimpleFilter
debugTipText, getDebug, setDebug, setInputFormat
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Methods inherited from class weka.filters.Filter
batchFilterFile, filterFile, getCapabilities, getOutputFormat, isFirstBatchDone, isNewBatch, isOutputFormatDefined, makeCopies, makeCopy, numPendingOutput, output, outputPeek, toString, useFilter, wekaStaticWrapper
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Method Detail
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globalInfo
public java.lang.String globalInfo()
Returns a string describing this filter.- Specified by:
globalInfo
in classSimpleFilter
- Returns:
- a description of the filter suitable for displaying in the explorer/experimenter gui
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listOptions
public java.util.Enumeration listOptions()
Returns an enumeration describing the available options.- Specified by:
listOptions
in interfaceOptionHandler
- Overrides:
listOptions
in classSimpleFilter
- Returns:
- an enumeration of all the available options.
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getOptions
public java.lang.String[] getOptions()
Gets the current settings of the filter.- Specified by:
getOptions
in interfaceOptionHandler
- Overrides:
getOptions
in classSimpleFilter
- Returns:
- an array of strings suitable for passing to setOptions
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setOptions
public void setOptions(java.lang.String[] options) throws java.lang.Exception
Parses a given list of options. Valid options are:-D Turns on output of debugging information.
-N <double> The number of attributes to randomly select. If < 1 then percentage, >= 1 absolute number. (default: 0.5)
-S <int> The seed value. (default: 1)
- Specified by:
setOptions
in interfaceOptionHandler
- Overrides:
setOptions
in classSimpleFilter
- Parameters:
options
- the list of options as an array of strings- Throws:
java.lang.Exception
- if an option is not supported- See Also:
SimpleFilter.reset()
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numAttributesTipText
public java.lang.String numAttributesTipText()
Returns the tip text for this property.- Returns:
- tip text for this property suitable for displaying in the explorer/experimenter gui
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getNumAttributes
public double getNumAttributes()
Get the number of attributes (< 1 percentage, >= 1 absolute number).- Returns:
- the number of attributes.
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setNumAttributes
public void setNumAttributes(double value)
Set the number of attributes.- Parameters:
value
- the number of attributes to use.
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seedTipText
public java.lang.String seedTipText()
Returns the tip text for this property.- Returns:
- tip text for this property suitable for displaying in the explorer/experimenter gui
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getSeed
public int getSeed()
Get the seed value for the random number generator.- Returns:
- the seed value.
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setSeed
public void setSeed(int value)
Set the seed value for the random number generator.- Parameters:
value
- the seed value.
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getCapabilities
public Capabilities getCapabilities()
Returns the Capabilities of this filter.- Specified by:
getCapabilities
in interfaceCapabilitiesHandler
- Overrides:
getCapabilities
in classFilter
- Returns:
- the capabilities of this object
- See Also:
Capabilities
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getRevision
public java.lang.String getRevision()
Returns the revision string.- Specified by:
getRevision
in interfaceRevisionHandler
- Overrides:
getRevision
in classFilter
- Returns:
- the revision
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main
public static void main(java.lang.String[] args)
Runs the filter with the given parameters. Use -h to list options.- Parameters:
args
- the commandline options
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